According to the latest guidance from the CDC, people are considered fully vaccinated two weeks after their second dose of the Pfizer or Moderna vaccine, or two weeks after they get the Johnson & Johnson vaccine.
Once you are fully vaccinated, you can visit other fully vaccinated people indoors without masks or social distancing. You can also visit unvaccinated people from a single household indoors without wearing masks or social distancing, as long as the unvaccinated people are not at high risk for severe illness from COVID-19. Fully vaccinated people can also participate in outdoor activities and recreation without wearing a mask, except in crowded settings and venues.
For now, fully vaccinated people should continue to wear masks in indoor, public settings, when visiting unvaccinated people who are at increased risk for severe COVID-19, and when visiting unvaccinated people from multiple households.